/* Basic styles */
* { box-sizing: border-box; }

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #1e1e2f;
    color: #fff;
    margin: 0;
    padding: 0;
}

nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: #111133;
    display: flex;
    justify-content: center;
    gap: 10px;
    padding: 10px 0;
    z-index: 1000;
}

nav button {
    background: #00ccff;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    color: #fff;
    cursor: pointer;
    font-weight: bold;
}

nav button:hover { background: #00aacc; }

header {
    text-align: center;
    margin-top: 80px; /* space for nav */
}

header h1 {
    color: #ffcc00;
    font-size: 3rem;
    margin-bottom: 0;
}

header p { color: #ffffffcc; }

main {
    max-width: 800px;
    margin: 50px auto;
    padding-bottom: 50px;
}

section { margin-bottom: 50px; }

section h2 {
    color: #00ccff;
    margin-bottom: 10px;
}

ul { list-style: disc inside; margin: 0; padding-left: 0; }